Maueice joyce



(N0 ModeL) M. JOYCE.

STERBOTYPE BLOCK.

No. 327,798. Patented Oct. 6, 1885.

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UNITED STATES PATENT CEFIcE.

MAURICE JOYCE, OF XVASHINGTON, DISTRICT OF COLUMBIA.

STEREOTYPE-BLOC K.

SPECIFICATION forming part of Letters Patent No. 327,798, dated October 6, 1885.

Application filed June 11, 1885. Serial No. 168,389. (No model.)

To aZZ whom it may concern.-

Be it known that I, MAURICE J OYOE, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in StereotypeBlocks, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to blocks for stereotype and similar printing-plates.

The invention consists in a curved wooden block for such plates, constructed in the peculiar manner hereinafter described and claimed.

The object of the invention is to produce a stereotype-block which will retain a curved form under all the conditions under which such blocks are used, without tendency to warp and break or distort the plate.

In the drawings, Figure 1 is a perspective of a wooden block with longitudinal saw-kerfs in its face. Fig. 2 is a transverse section of same with the expanding-wedges in position. Fig. 3 is a plan or face view of same. Fig. 4 is a section of one of the wedges. Fig. 5 is a transverse section of block with printing-plate applied.

A indicates a wooden block of the general character employed for mounting stereotypeplates. In the face of this block, longitudinally of the grain, saw kerfs or grooves B are made, parallel with each other, and extending, preferably, a little more than halfway through the plate.

Thin wooden wedges C are pressed into the saw-kerfs B, the thick edge of the wedge being a little thicker than the width of the sawkerfs. These wedges will pry apart the parts of the block between the top of the saw-kerfs (the bottom of the block not being expanded: so that the block will assume a curved form The radius of curvature may be easily deter mined by the number and distance apart 0 the slits or saw-kerfs and the thickness 0 the wedges inserted.

The plate D is secured to the block A b; brads or screws E, or in other usual manner and when so secured holds the wedges i1 place.

I am aware that curved metallic blocks an old; but such are much more expensive, and owing to theirgreat weight, must be fastened t the turtle of a cylinder-press by specia mechanism.

I am also aware that curved wooden block have been described, but without the slits 3H1 wedges,which make the curvature of the blocl permanent and prevent strain on the plate.

I claim- 1. A'wooden stereotype-block having lon gitudinal slits or kerfs and expanding-wedge forced into the kerfs, whereby the block 1' curved, as set forth.

2. The combination, with wooden block A having longitudinal kerfs in its face, of th expansion-wedges C, which are forced int said kerfs, and the stereotype or similar plat D, secured to said block, substantially as Ch scribed.

In testimony whereof I afifix my signatnr in presence of two witnesses.

MAURICE JOYCE.

W'itnesses:

W. A. BARTLETT, W. D. HARRISON. 

